JP4101446B2 - Electrical connection terminal - Google Patents

Electrical connection terminal Download PDF

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Publication number
JP4101446B2
JP4101446B2 JP2000222695A JP2000222695A JP4101446B2 JP 4101446 B2 JP4101446 B2 JP 4101446B2 JP 2000222695 A JP2000222695 A JP 2000222695A JP 2000222695 A JP2000222695 A JP 2000222695A JP 4101446 B2 JP4101446 B2 JP 4101446B2
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Prior art keywords
circuit body
flat
flat circuit
electrical connection
connection terminal
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JP2000222695A
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JP2002042942A (en
Inventor
昌広 沢柳
康路 ▲桑▼山
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Yazaki Corp
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Yazaki Corp
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Priority to JP2000222695A priority Critical patent/JP4101446B2/en
Priority to US09/910,788 priority patent/US6565377B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/65—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures characterised by the terminal
    • H01R12/67—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures characterised by the terminal insulation penetrating terminals
    • H01R12/68—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures characterised by the terminal insulation penetrating terminals comprising deformable portions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/118—Printed elements for providing electric connections to or between printed circuits specially for flexible printed circuits, e.g. using folded portions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/325—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor
    • H05K3/326—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor the printed circuit having integral resilient or deformable parts, e.g. tabs or parts of flexible circuits

Description

【０００１】
【発明の属する技術分野】
本発明は、平面部の両側縁に立設された少なくとも一対の突刺部の各先端が、フラット回路体の被覆及び導体を貫通した後、互いに接近する方向に折り返されることで、前記フラット回路体に接続される電気接続端子の改良に関するものである。
【０００２】
【従来の技術】
図９は、フラット回路体１と、該フラット回路体１に接続する従来の電気接続端子２を示したものである。
前記フラット回路体１は、複数の長尺薄板状の導体４ａ，４ｂ，・・・を薄膜状の絶縁被覆５で覆って、全体として可撓性を有した帯状のケーブルに仕上げたＦＦＣ（フレキシブル・フラット・ケーブル）である。前記導体４ａ，４ｂ，・・・は、パターン印刷で形成したり、あるいは、予めテープ状に形成した導電材料を絶縁性のシート上に貼付するなど、各種の製法で形成される。
【０００３】
前記電気接続端子２は、例えば特開平１１−１４４７８０号公報等に開示されたものであり、平面部６と、該平面部６の基端側の両側縁に立設された複数対の突刺部７，８と、前記平面部６の先端側に形成された図示せぬ端子接続部とを一体形成した構造である。
図示せぬ端子接続部は、他の接続端子と接続するためのもので、例えば、コネクタハウジングに収容保持される雌端子構造、あるいは雄端子構造に形成される。
【０００４】
上記電気接続端子２は、所謂、ピアッシング端子と呼ばれているもので、図１０に示したように、平面部６の両側縁の突刺部７，８の各先端が、フラット回路体１の被覆５及び導体４ａ（４ｂ）を貫通した後、互いに接近する方向に折り返されることで、前記フラット回路体１と電気的及び機械的に接続される。
即ち、前記フラット回路体１の皮剥をせずに、該フラット回路体１に突刺部７，８の各先端を貫通させ、折り返すだけで、フラット回路体１の導体４ａ（４ｂ）と電気接続端子２とを接続することができる。そこで、接続に要する加工工程数を削減することができ、より低いコストでフラット回路体１の配線作業を行なうことができる。
【０００５】
【発明が解決しようとする課題】
しかしながら、前述した電気接続端子２では、図１０に示したように、各突刺部７，８毎に、折り返しに必要な寸法Ｌ1 を確保すると共に、各突刺部７，８との間に折り返し時の干渉を避けるための隙間Ｌ2 を確保しており、一つの電気接続端子２のフラット回路体１での占有幅Ｌ3 は、大きな占有幅が必要になる。
その結果、フラット回路体１上での導体４ａ，４ｂ，・・・の配列ピッチＰ1 が大きくなり、フラット回路体１の大型化等の問題が生じた。
【０００６】
また、前記電気接続端子２において折り返した突刺部７，８の先端は、図１１に矢印（Ａ）で示したように、スプリングバックによって先端部が戻り、その結果、フラット回路体１に対する電気接続端子２の固定が緩み、ガタつき等の発生によって導通信頼性が低下する可能性があった。
そこで、このようなスプリングバックによる導通信頼性の低下を防止する為に、図１２に示したように、電気接続端子２の平面部６の中央にフラット回路体１を押し上げる凸部（インデント）１０を設けると共に、その凸部１０の両側に各突刺部７，８の先端が挿通可能な貫通孔１１，１２を設けておき、前記フラット回路体１を貫通させた一対の突刺部７，８の折り返し時に、各突刺部７，８の先端を、再度、フラット回路体１に貫通させる２度刺し構造にすることが提案されている。
【０００７】
しかしながら、このような対応により、スプリングバックによる緩みを低減させて、導通信頼性の低下を抑えることはできたが、その反面、一対の突刺部７，８の２度刺しの加工のために、一対の突刺部７，８間に確保しなければ成らない隙間Ｌ2 が更に増大し、その結果、前述したフラット回路体１における導体の配列ピッチＰ1 が更に広がり、フラット回路体１が一層大型化するという問題が生じた。
【０００８】
そこで、本発明の目的は上記課題を解消することにあり、フラット回路体に対する導通信頼性の向上を図り、フラット回路体の狭幅化を実現することができる良好な電気接続端子を提供することである。
【０００９】
【課題を解決するための手段】
本発明の上記目的は、平面部の両側縁に立設された少なくとも一対の突刺部の各先端が、フラット回路体の被覆及び導体を貫通した後、互いに接近する方向に折り返されることで、前記フラット回路体に接続される電気接続端子であって、前記平面部に、前記フラット回路体に向かって突出する打ち出し凸部を備え、前記フラット回路体を貫通した一対の突刺部の一方の先端が、前記平面部側へ反転されて、前記打ち出し凸部により曲げ変形された前記フラット回路体の導体に対し、前記平面部が平らな場合に比べて少ない折り返し量で、再び導体に突き刺されると共に、他方の先端が、前記一方の先端を前記平面部方向へ付勢するように前記一方の先端の上に重ね合わせられて、一方の突刺し部のスプリングバックを規制することを特徴とする電気接続端子により達成される。
【００１０】
上記構成によれば、フラット回路体に突き刺される一対の突刺部は、フラット回路体を貫通して折り返す際に、一方の突刺部の先端の上に他方の突刺部の先端が重ね合わせられる為、一対の突刺部の占有幅が、略一方の突刺部の占有幅のみで足りる。
そこで、一対の突刺部のそれぞれが個別に占有幅を必要とすると共に一対の突刺部間に隙間を設けなければならなかった従来の電気接続端子と比較すると、一つの電気接続端子のフラット回路体上での占有幅を大幅に低減することができ、フラット回路体上での導体の配列ピッチの狭ピッチ化を図ることができる。
【００１１】
また、フラット回路体を貫通した後、先に折り返される一方の突刺部の先端は、再びフラット回路体の導体を突き刺した状態とされ、他方の突刺部の先端で押さえ込まれる為、該他方の突刺部の先端によって一方の突刺部のスプリングバックを規制することができる。
そこで、フラット回路体に対する電気接続端子の固定がスプリングバックによって緩むことがなく、フラット回路体に対する導通信頼性も向上する。
【００１２】
さらに、上記構成によれば、前記平面部には、前記フラット回路体に向かって突出した打ち出し凸部が形成される。この場合、前記打ち出し凸部上のフラット回路体は、折り返された一方の突刺部の先端に向かって持ち上げられた状態となる。そこで、平面部側へ反転されて再び導体に突き刺される前記一方の突刺部の先端は、前記平面部が平らな場合に比べて少ない折り返し量で容易に前記導体に突き刺ささることができる。
【００１３】
又、前記打ち出し凸部が前記フラット回路体の導体に曲げ変形を加えることで、各突刺部の貫通部分には該導体の剪断面が押し付けられ、接触荷重を高めることができる。
そこで、フラット回路体に対する導通信頼性が更に向上する。
【００１４】
【発明の実施の形態】
以下、添付図面に基づいて本発明の一実施形態に係る電気接続端子を詳細に説明する。
図１は本発明の一実施形態に係る電気接続端子をフラット回路体の端部に取り付けた状態の斜視図、図２は図１に示した電気接続端子の部分破断側面図、図３は図１に示した電気接続端子の上面図、図４は図２のIV-IV 断面矢視図、図５及び図６は図１に示した電気接続端子のフラット回路体への接続手順を説明する為の断面図、図７及び図８は図１に示した電気接続端子をフラット回路体の長手方向の途中に取り付けた状態の要部拡大図及び概略全体図である。
【００１５】
本実施形態の電気接続端子２１を接続するフラット回路体１は、図９に示したフラット回路体１と同一構造のもので、複数の長尺薄板状の導体４ａ，４ｂ，・・・を薄膜状の絶縁被覆５で覆って、全体として可撓性を有した帯状のケーブルに仕上げたＦＦＣ（フレキシブル・フラット・ケーブル）である。尚、本発明におけるフラット回路体としては、導体をパターン印刷で形成したＦＰＣ（フレキシブル・プリント基板）等を用いることもできる。
【００１６】
本実施形態の電気接続端子２１は、図１乃至図４に示したように、平面部２３と、該平面部２３の基端側（図２中、左側）の両側縁に立設された二対の突刺部２５，２６と、前記平面部２３の先端側（図２中、右側）に形成された端子接続部２８とを、導電性金属板より一体形成した構造である。更に、前記平面部２３には、前記フラット回路体１に向かって突出した打ち出し凸部（インデント）３２が形成されている。
【００１７】
前記端子接続部２８は、本実施形態の場合、他の接続端子と嵌合接続する雌形端子であり、図８に示すように、コネクタハウジング３０内に収容保持されて、コネクタ同士の嵌合によって他の接続端子と接続される。勿論、端子接続部２８を雄形端子で構成することもできる。
【００１８】
前記電気接続端子２１は、図１に示すように、互いに対をなす突刺部２５，２６の各先端が、フラット回路体１の被覆５及び導体４ａ（４ｂ）を共に貫通した後、互いに接近する方向に折り返されることで、前記フラット回路体１に接続される、所謂ピアッシング端子である。
また、図４に示すように、前記電気接続端子２１の互いに対をなす突刺部２５，２６の間隔Ｌ5 は、図９に示した従来の電気接続端子２における突刺部７，８の間隔よりも狭く設定されている。
【００１９】
そして、図５及び図６に示すように、前記フラット回路体１の被覆５及び導体４ａを貫通した一対の突刺部２５，２６の一方の突刺部２６の先端が、前記平面部２３側へ反転されて再び導体４ａに突き刺されると共に、他方の突刺部２５の先端が、前記一方の突刺部２６の先端を前記平面部２３方向へ付勢するように該一方の突刺部２６の先端の上に重ね合わせられることにより、該フラット回路体１に接続される。
【００２０】
即ち、本実施形態の電気接続端子２１によれば、フラット回路体１に突き刺される一対の突刺部２５，２６は、フラット回路体１を貫通して折り返す際に、一方の突刺部２６の先端の上に他方の突刺部２５の先端が重ね合わせられる為、図６に示すように、一対の突刺部の占有幅Ｌ6 が、略一方の突刺部２６の占有幅のみで足りる。
【００２１】
そこで、図１０に示したように一対の突刺部７，８のそれぞれが個別に占有幅Ｌ1 を必要とすると共に一対の突刺部７，８間に隙間Ｌ2 を設けなければならなかった従来の電気接続端子２と比較すると、本実施形態の電気接続端子２１は、一つの電気接続端子２１のフラット回路体１上での占有幅Ｌ6 を大幅に低減することができ、フラット回路体１上での導体４ａ，４ｂ，・・・の配列ピッチＰ2 の狭ピッチ化を図ることができるので、フラット回路体１の狭幅化を実現することができる。
【００２２】
また、前記フラット回路体１を貫通した後、先に折り返される一方の突刺部２６の先端は、再びフラット回路体１の導体４ａ（４ｂ）を突き刺した状態とされ、他方の突刺部２５の先端で押さえ込まれる為、該他方の突刺部２５の先端によって一方の突刺部２６のスプリングバックを規制することができる。
そこで、フラット回路体１に対する電気接続端子２１の固定がスプリングバックによって緩むことがなく、フラット回路体１に対する導通信頼性も向上する。
【００２３】
又、本実施形態の電気接続端子２１の平面部２３には、図６に示すように、前記フラット回路体１に向かって突出した打ち出し凸部３２が形成されている。
そこで、前記打ち出し凸部３２上のフラット回路体１は、折り返された一方の突刺部２６の先端に向かって持ち上げられた状態となるので、平面部２３側へ反転されて再び導体４ａ（４ｂ）に突き刺される前記一方の突刺部２６の先端は、前記平面部２３が平らな場合に比べて少ない折り返し量で容易に前記導体４ａ（４ｂ）に突き刺ささることができる。
【００２４】
即ち、前記平面部２３側へ反転された前記一方の突刺部２６の先端は、再び導体４ａ（４ｂ）に突き刺される為に、十分な折り返し量が必要である。しかしながら、前記電気接続端子２１の板厚と占有幅の関係によっては、十分な折り返し量を得られない可能性がある。
そこで、上述の如き打ち出し凸部３２を平面部２３に形成することにより、少ない折り返し量で確実に前記導体４ａ（４ｂ）に突き刺ささることができ、より狭い占有幅の設定も可能となり、更なる狭ピッチ化も達成できる。
【００２５】
又、前記打ち出し凸部３２が、前記フラット回路体１の導体４ａ（４ｂ）に曲げ変形を加えることで、各突刺部２５，２６の貫通部分には該導体４ａ（４ｂ）の剪断面が押し付けられるので、各突刺部２５，２６に対する導体４ａ（４ｂ）の接触荷重を高めることもできる。
そこで、フラット回路体１に対する導通信頼性を更に向上されることができる。
【００２６】
なお、上記実施形態では、電気接続端子２１の平面部２３の基端側での突刺部２５，２６の装備数を二対としたが、本発明では少なくとも一対あればよく、機械的な接続強度や電気的な接触面積の確保等の観点から、適宜設定されるものである。
又、上記電気接続端子２１のフラット回路体１への取付位置は、図１に示したフラット回路体１の端部に限らず、図７及び図８に示したように、フラット回路体１の長手方向の途中に取り付けて、分岐回路を構成することも可能である。
【００２７】
【発明の効果】
上述した如き本発明の電気接続端子によれば、フラット回路体に突き刺される一対の突刺部は、フラット回路体を貫通して折り返す際に、一方の突刺部の先端の上に他方の突刺部の先端が重ね合わせられる為、一対の突刺部の占有幅が、略一方の突刺部の占有幅のみで足りる。
そこで、一対の突刺部のそれぞれが個別に占有幅を必要とすると共に一対の突刺部間に隙間を設けなければならなかった従来の電気接続端子と比較すると、一つの電気接続端子のフラット回路体上での占有幅を大幅に低減することができ、フラット回路体上での導体の配列ピッチの狭ピッチ化を図ることができる。
【００２８】
また、フラット回路体を貫通した後、先に折り返される一方の突刺部の先端は、再びフラット回路体の導体を突き刺した状態とされ、他方の突刺部の先端で押さえ込まれる為、該他方の突刺部の先端によって一方の突刺部のスプリングバックを規制することができる。
そこで、フラット回路体に対する電気接続端子の固定がスプリングバックによって緩むことがなく、フラット回路体に対する導通信頼性も向上する。
従って、フラット回路体に対する導通信頼性の向上を図り、フラット回路体の狭幅化を実現することができる良好な電気接続端子を提供できる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る電気接続端子をフラット回路体の端部に取り付けた状態の斜視図である。
【図２】図１に示した電気接続端子の部分破断側面図である。
【図３】図１に示した電気接続端子の上面図である。
【図４】図２のIV-IV 断面矢視図である。
【図５】図１に示した電気接続端子のフラット回路体への接続手順を説明する為の断面図である。
【図６】図１に示した電気接続端子のフラット回路体への接続手順を説明する為の断面図である。
【図７】図１に示した電気接続端子をフラット回路体の長手方向の途中に取り付けた状態の要部拡大図である。
【図８】図１に示した電気接続端子をフラット回路体の長手方向の途中に取り付けた状態の概略全体図である。
【図９】フラット回路体に接続する従来の電気接続端子を示した斜視図である。
【図１０】図９に示した電気接続端子のフラット回路体との接続部の横断面図である。
【図１１】図９に示した電気接続端子の突刺部のスプリングバックを示す要部断面図である。
【図１２】従来の他の電気接続端子におけるフラット回路体との接続部の横断面図である。
【符号の説明】
１ フラット回路体
４ａ，４ｂ 導体
５ 被覆
２１ 電気接続端子
２３ 平面部
２５ 突刺部
２６ 突刺部
２８ 端子接続部
３２ 打ち出し凸部[0001]
BACKGROUND OF THE INVENTION
The present invention provides the flat circuit body in which the tips of at least a pair of piercing portions standing on both side edges of the flat surface portion are folded back in directions approaching each other after passing through the coating and conductor of the flat circuit body. It is related with the improvement of the electrical connection terminal connected to.
[0002]
[Prior art]
FIG. 9 shows a flat circuit body 1 and a conventional electrical connection terminal 2 connected to the flat circuit body 1.
The flat circuit body 1 includes a plurality of long thin plate-like conductors 4a, 4b,... Covered with a thin-film insulating coating 5 and finished into a flexible strip-shaped cable as a whole.・ Flat cable). The conductors 4a, 4b,... Are formed by various manufacturing methods such as pattern printing or pasting a conductive material previously formed in a tape shape on an insulating sheet.
[0003]
The electrical connection terminal 2 is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-144780, and the like, and includes a flat portion 6 and a plurality of pairs of piercing portions provided on both side edges on the base end side of the flat portion 6. 7 and 8 and a terminal connection portion (not shown) formed on the front end side of the flat portion 6 are integrally formed.
The terminal connection portion (not shown) is for connecting to another connection terminal, and is formed, for example, in a female terminal structure or a male terminal structure accommodated and held in the connector housing.
[0004]
The electrical connection terminal 2 is a so-called piercing terminal. As shown in FIG. 10, the tips of the piercing parts 7 and 8 on both side edges of the flat part 6 are covered with the flat circuit body 1. After passing through 5 and the conductor 4a (4b), the flat circuit body 1 is electrically and mechanically connected by folding back in a direction approaching each other.
That is, the conductor 4a (4b) and the electrical connection terminal of the flat circuit body 1 are simply passed through the flat circuit body 1 without passing through the tips of the piercing portions 7 and 8 without peeling off the flat circuit body 1. 2 can be connected. Therefore, the number of processing steps required for connection can be reduced, and the wiring work of the flat circuit body 1 can be performed at a lower cost.
[0005]
[Problems to be solved by the invention]
However, in the electrical connection terminal 2 described above, as shown in FIG. 10, the dimension L 1 required for folding is secured for each piercing portion 7, 8, and folded back between each piercing portion 7, 8. A gap L 2 for avoiding interference at the time is secured, and the occupied width L 3 in the flat circuit body 1 of one electrical connection terminal 2 requires a large occupied width.
As a result, the arrangement pitch P 1 of the conductors 4a, 4b,... On the flat circuit body 1 is increased, and problems such as an increase in the size of the flat circuit body 1 occur.
[0006]
Further, as shown by the arrow (A) in FIG. 11, the tips of the piercing portions 7 and 8 turned back at the electrical connection terminal 2 are returned by the spring back, and as a result, the electrical connection to the flat circuit body 1 is achieved. There is a possibility that the reliability of conduction is lowered due to looseness of the terminal 2 and the occurrence of rattling.
Therefore, in order to prevent such deterioration of the conduction reliability due to the spring back, as shown in FIG. 12, a convex portion (indent) 10 that pushes up the flat circuit body 1 at the center of the flat portion 6 of the electrical connection terminal 2. In addition, through holes 11 and 12 through which the tips of the piercing portions 7 and 8 can be inserted are provided on both sides of the convex portion 10, and the pair of piercing portions 7 and 8 that penetrate the flat circuit body 1 are provided. It has been proposed that the tip of each of the piercing portions 7 and 8 be pierced twice through the flat circuit body 1 when folded.
[0007]
However, due to such correspondence, it was possible to reduce the looseness due to the springback and suppress the decrease in the conduction reliability, but on the other hand, for the processing of the two piercing portions 7 and 8 twice, The gap L 2 that must be secured between the pair of piercing portions 7 and 8 is further increased. As a result, the conductor arrangement pitch P 1 in the flat circuit body 1 is further increased, and the flat circuit body 1 is further enlarged. The problem of becoming
[0008]
Accordingly, an object of the present invention is to eliminate the above-described problems, and to provide a good electrical connection terminal capable of improving the conduction reliability with respect to the flat circuit body and realizing the narrowing of the flat circuit body. It is.
[0009]
[Means for Solving the Problems]
The above-mentioned object of the present invention is that each tip of at least a pair of piercing portions erected on both side edges of the flat surface portion is folded in a direction approaching each other after passing through the covering and conductor of the flat circuit body, An electrical connection terminal connected to the flat circuit body , wherein the flat surface portion has a projecting protrusion projecting toward the flat circuit body, and one end of a pair of piercing portions penetrating the flat circuit body In addition, the conductor of the flat circuit body that is reversed to the flat portion side and bent and deformed by the projecting convex portion is pierced by the conductor again with a smaller amount of folding compared to the case where the flat portion is flat , the other tip, and the superimposed on one of the tip to urge the tip of the one to the flat portion direction, and characterized that you regulating spring back of one of the piercing portion It is achieved by an electrical connection terminal that.
[0010]
According to the above configuration, when the pair of piercing portions pierced by the flat circuit body penetrates and folds through the flat circuit body, the tip of the other piercing portion is superimposed on the tip of the one piercing portion. The occupation width of the pair of piercing portions is sufficient only with the occupation width of one of the piercing portions.
Therefore, compared with the conventional electrical connection terminal in which each of the pair of piercing portions individually needs an occupied width and a gap must be provided between the pair of piercing portions, the flat circuit body of one electrical connection terminal The occupied width on the top can be greatly reduced, and the arrangement pitch of the conductors on the flat circuit body can be narrowed.
[0011]
In addition, after penetrating the flat circuit body, the tip of one piercing portion that is folded back first is pierced by the conductor of the flat circuit body again and is held down by the tip of the other piercing portion. The spring back of one piercing part can be regulated by the tip of the part.
Therefore, the electrical connection terminal is not loosened by the spring back with respect to the flat circuit body, and the conduction reliability with respect to the flat circuit body is also improved.
[0012]
Further, according to the above configuration, the projecting convex portion projecting toward the flat circuit body is formed on the planar portion. In this case, the flat circuit body on the projecting convex portion is in a state of being lifted toward the tip of the folded one piercing portion. Therefore, the tip of the one piercing portion that is inverted to the flat portion side and pierced by the conductor can be easily pierced by the conductor with a smaller amount of folding than when the flat portion is flat.
[0013]
In addition, since the projecting convex portion bends and deforms the conductor of the flat circuit body, the shear surface of the conductor is pressed against the penetrating portion of each piercing portion, and the contact load can be increased.
Therefore, the conduction reliability with respect to the flat circuit body is further improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electrical connection terminal according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of an electrical connection terminal according to an embodiment of the present invention attached to an end of a flat circuit body, FIG. 2 is a partially cutaway side view of the electrical connection terminal shown in FIG. 1, and FIG. 4 is a top view of the electrical connection terminal shown in FIG. 1, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and FIGS. 5 and 6 illustrate a procedure for connecting the electrical connection terminal shown in FIG. FIGS. 7 and 8 are an enlarged view of a main part and a schematic overall view in a state where the electrical connection terminals shown in FIG. 1 are attached in the middle of the flat circuit body in the longitudinal direction.
[0015]
The flat circuit body 1 to which the electrical connection terminals 21 of the present embodiment are connected has the same structure as the flat circuit body 1 shown in FIG. 9, and a plurality of long thin plate-like conductors 4a, 4b,. FFC (flexible flat cable) which is covered with a strip-shaped insulating coating 5 and finished into a strip-like cable having flexibility as a whole. In addition, as a flat circuit body in this invention, FPC (flexible printed circuit board) etc. which formed the conductor by pattern printing can also be used.
[0016]
As shown in FIG. 1 to FIG. 4, the electrical connection terminal 21 of the present embodiment is provided with two flat portions 23 and two side edges on the base end side (left side in FIG. 2) of the flat portion 23. A pair of piercing portions 25 and 26 and a terminal connection portion 28 formed on the tip side (right side in FIG. 2) of the flat surface portion 23 are integrally formed from a conductive metal plate. Further, a projecting convex portion (indent) 32 projecting toward the flat circuit body 1 is formed on the planar portion 23.
[0017]
In the case of this embodiment, the terminal connection portion 28 is a female terminal that is fitted and connected to another connection terminal. As shown in FIG. 8, the terminal connection portion 28 is accommodated and held in the connector housing 30 so that the connectors are fitted to each other. Is connected to other connection terminals. Of course, the terminal connection part 28 can also be comprised by a male terminal.
[0018]
As shown in FIG. 1, the electrical connection terminal 21 approaches each other after the tips of the piercing portions 25, 26 that are paired with each other penetrate both the coating 5 and the conductor 4 a (4 b) of the flat circuit body 1. It is a so-called piercing terminal connected to the flat circuit body 1 by being folded in the direction.
Further, as shown in FIG. 4, the distance L 5 between the piercing portions 25 and 26 that form a pair with the electrical connection terminal 21 is larger than the distance between the piercing portions 7 and 8 in the conventional electrical connection terminal 2 shown in FIG. Is set too narrow.
[0019]
As shown in FIGS. 5 and 6, the tip of one piercing portion 26 of the pair of piercing portions 25, 26 penetrating the coating 5 and the conductor 4 a of the flat circuit body 1 is inverted to the plane portion 23 side. Then, the conductor 4a is pierced again, and the tip of the other piercing portion 25 is placed on the tip of the one piercing portion 26 so as to urge the tip of the one piercing portion 26 toward the plane portion 23. By being superimposed, the flat circuit body 1 is connected.
[0020]
That is, according to the electrical connection terminal 21 of the present embodiment, the pair of piercing portions 25 and 26 pierced into the flat circuit body 1 is formed at the tip of one of the piercing portions 26 when folded back through the flat circuit body 1. Since the tip of the other piercing portion 25 is superimposed on the upper side, as shown in FIG. 6, the occupied width L 6 of the pair of piercing portions is sufficient only by the occupied width of one of the piercing portions 26.
[0021]
Therefore, as shown in FIG. 10, each of the pair of piercing portions 7, 8 requires an occupied width L 1 and a gap L 2 must be provided between the pair of piercing portions 7, 8. Compared with the electrical connection terminal 2, the electrical connection terminal 21 of the present embodiment can greatly reduce the occupied width L 6 of the single electrical connection terminal 21 on the flat circuit body 1. conductors 4a of above, 4b, so it is possible to narrow the pitch of the arrangement pitch P 2 of ..., it is possible to realize a narrowing of the flat circuit body 1.
[0022]
Further, after penetrating through the flat circuit body 1, the tip of one piercing portion 26 that is folded back first is pierced with the conductor 4 a (4 b) of the flat circuit body 1, and the tip of the other piercing portion 25. Therefore, the spring back of one piercing portion 26 can be regulated by the tip of the other piercing portion 25.
Therefore, the electrical connection terminal 21 is not fixed to the flat circuit body 1 by the springback, and the conduction reliability with respect to the flat circuit body 1 is improved.
[0023]
Further, as shown in FIG. 6, a projecting convex portion 32 projecting toward the flat circuit body 1 is formed on the flat portion 23 of the electrical connection terminal 21 of the present embodiment.
Therefore, the flat circuit body 1 on the projecting convex portion 32 is in a state of being lifted toward the tip of the folded back piercing portion 26, so that the flat circuit body 1 is reversed to the flat portion 23 side and again is the conductor 4a (4b). The tip of the one piercing portion 26 pierced into the conductor can be easily pierced into the conductor 4a (4b) with a smaller amount of folding than when the flat portion 23 is flat.
[0024]
That is, the tip of the one piercing portion 26 reversed to the flat surface portion 23 side is again pierced by the conductor 4a (4b), so that a sufficient amount of folding is necessary. However, depending on the relationship between the thickness of the electrical connection terminal 21 and the occupied width, there is a possibility that a sufficient amount of folding cannot be obtained.
Therefore, by forming the projecting convex portion 32 as described above on the flat surface portion 23, the conductor 4a (4b) can be reliably stabbed with a small amount of folding, and a narrower occupation width can be set. Narrow pitch can also be achieved.
[0025]
In addition, the projecting protrusion 32 applies a bending deformation to the conductor 4a (4b) of the flat circuit body 1, so that the shear surface of the conductor 4a (4b) is pressed against the penetrating portions of the piercing portions 25 and 26. Therefore, the contact load of the conductor 4a (4b) with respect to each piercing part 25 and 26 can also be raised.
Therefore, the conduction reliability with respect to the flat circuit body 1 can be further improved.
[0026]
In the above embodiment, the number of the piercing portions 25 and 26 on the base end side of the flat surface portion 23 of the electrical connection terminal 21 is two pairs. However, in the present invention, at least a pair is sufficient, and mechanical connection strength is sufficient. From the viewpoint of securing the electrical contact area and the like, it is appropriately set.
Further, the mounting position of the electrical connection terminal 21 to the flat circuit body 1 is not limited to the end portion of the flat circuit body 1 shown in FIG. 1, but as shown in FIGS. It is also possible to constitute a branch circuit by being attached in the middle of the longitudinal direction.
[0027]
【The invention's effect】
According to the electrical connection terminal of the present invention as described above, when the pair of piercing portions pierced by the flat circuit body penetrates and folds back through the flat circuit body, the other piercing portion is placed on the tip of one piercing portion. Since the tips are overlapped, the occupied width of the pair of piercing portions is sufficient only by the occupying width of one of the piercing portions.
Therefore, compared with the conventional electrical connection terminal in which each of the pair of piercing portions individually needs an occupied width and a gap must be provided between the pair of piercing portions, the flat circuit body of one electrical connection terminal The occupied width on the top can be greatly reduced, and the arrangement pitch of the conductors on the flat circuit body can be narrowed.
[0028]
In addition, after penetrating the flat circuit body, the tip of one piercing portion that is folded back first is pierced by the conductor of the flat circuit body again and is held down by the tip of the other piercing portion. The spring back of one piercing part can be regulated by the tip of the part.
Therefore, the electrical connection terminal is not loosened by the spring back with respect to the flat circuit body, and the conduction reliability with respect to the flat circuit body is also improved.
Therefore, it is possible to improve the conduction reliability with respect to the flat circuit body and provide a good electrical connection terminal capable of realizing the narrowing of the flat circuit body.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electrical connection terminal according to an embodiment of the present invention attached to an end of a flat circuit body.
2 is a partially cutaway side view of the electrical connection terminal shown in FIG.
3 is a top view of the electrical connection terminal shown in FIG. 1. FIG.
4 is a cross-sectional view taken along the line IV-IV in FIG. 2;
5 is a cross-sectional view for explaining a procedure for connecting the electrical connection terminals shown in FIG. 1 to a flat circuit body. FIG.
6 is a cross-sectional view for explaining a procedure for connecting the electrical connection terminal shown in FIG. 1 to the flat circuit body. FIG.
7 is an enlarged view of a main part in a state in which the electrical connection terminal shown in FIG. 1 is attached in the middle of the flat circuit body in the longitudinal direction. FIG.
FIG. 8 is a schematic overall view showing a state in which the electrical connection terminals shown in FIG. 1 are attached in the middle of the flat circuit body in the longitudinal direction.
FIG. 9 is a perspective view showing a conventional electrical connection terminal connected to a flat circuit body.
10 is a cross-sectional view of a connection portion between the electrical connection terminal shown in FIG. 9 and a flat circuit body.
11 is a cross-sectional view of a principal part showing a springback of a pierced portion of the electrical connection terminal shown in FIG. 9;
FIG. 12 is a cross-sectional view of a connection portion with a flat circuit body in another conventional electrical connection terminal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flat circuit body 4a, 4b Conductor 5 Coating | cover 21 Electrical connection terminal 23 Plane part 25 Puncture part 26 Puncture part 28 Terminal connection part 32 Launching convex part

Claims (1)

平面部の両側縁に立設された少なくとも一対の突刺部の各先端が、フラット回路体の被覆及び導体を貫通した後、互いに接近する方向に折り返されることで、前記フラット回路体に接続される電気接続端子であって、
前記平面部に、前記フラット回路体に向かって突出する打ち出し凸部を備え、
前記フラット回路体を貫通した一対の突刺部の一方の先端が、前記平面部側へ反転されて、前記打ち出し凸部により曲げ変形された前記フラット回路体の導体に対し、前記平面部が平らな場合に比べて少ない折り返し量で、再び導体に突き刺されると共に、
他方の先端が、前記一方の先端を前記平面部方向へ付勢するように前記一方の先端の上に重ね合わせられて、一方の突刺し部のスプリングバックを規制することを特徴とする電気接続端子。Each tip of at least a pair of piercing portions erected on both side edges of the flat portion passes through the cover and conductor of the flat circuit body, and then is folded back in a direction approaching each other, thereby being connected to the flat circuit body. An electrical connection terminal,
The flat portion includes a projecting convex portion projecting toward the flat circuit body,
One end of a pair of piercing portions penetrating the flat circuit body is inverted toward the flat portion side, and the flat portion is flat with respect to the conductor of the flat circuit body bent and deformed by the projecting convex portion. With a smaller amount of folding than the case, the conductor is stabbed again,
Electrical other tip, and the superimposed on one of the tip to urge the tip of the one to the flat portion direction, characterized that you regulating spring back of one of the piercing portion Connecting terminal.
JP2000222695A 2000-07-24 2000-07-24 Electrical connection terminal Expired - Lifetime JP4101446B2 (en)

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JP2000222695A JP4101446B2 (en) 2000-07-24 2000-07-24 Electrical connection terminal
US09/910,788 US6565377B2 (en) 2000-07-24 2001-07-24 Electric connecting terminal

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JP2003142796A (en) * 2001-10-31 2003-05-16 Furukawa Electric Co Ltd:The Mounting method of electronic component to wiring circuit body and mounting structure thereof
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US7686642B2 (en) 2008-03-03 2010-03-30 Tempo Industries, Inc. Wire harness interconnection and retention method and apparatus
JP5707735B2 (en) 2009-07-24 2015-04-30 住友電装株式会社 Electric wire with terminal fitting and method of manufacturing electric wire with terminal fitting
JP2011096452A (en) * 2009-10-28 2011-05-12 Yazaki Corp Crimping terminal
JP5705799B2 (en) * 2012-07-09 2015-04-22 古河電気工業株式会社 Flexible flat cable terminal holding structure
JP6060015B2 (en) * 2013-03-19 2017-01-11 矢崎総業株式会社 Crimp structure for the wire of the crimp terminal
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